Exam 2: Computer Systems

When a data item is retrieved from a memory cell,either to print out the item or to use it in a computation,the contents of the cell are unchanged.

DASD refers to:

In computer memory,a cell that can store two or more characters of data is called a:

The stored-program concept allows users to specify a list of operations that can be carried out at electronic speeds,rather than waiting for the user to specify each operation separately.

Each response below lists two operating systems in common use today.In which response are both of the operating systems listed open systems?

Which type of computer serves as the heart of the computing systems for many,perhaps most,major corporations and government agencies? This type of computer system also can act as a large Web server,as a server in a client/server application,and has the widest range of available applications.

The language translator program which translates an entire 3GL or 4GL program into machine language before any of the program is executed is called a(an):

Which of the following computer storage devices is not an example of a direct access storage device?

Encapsulation is one of the important features of objects (in object-oriented programming)in which a subclass inherits the properties,methods,and events of the class to which it belongs.

Virtual memory is a procedure by which the operating system switches portions of programs between main memory and direct access files so that portions of enough programs are stored in main memory to enable efficient multiprogramming; to the user,it appears as though an unlimited amount of main memory is available.

What is a commonly used rating of a computer's speed that is based on the number of instructions per second executed by the computer's control unit?

Which of the following is not an example of a computer output device?

A 4 GL,nonprocedural language-often provided with the database management system-which is used to retrieve data from a database is called a ________ language.

On large computers,the operating system switches back and forth among multiple programs stored in memory in order to overlap input and output operations with processing time; the purpose of this switching is to maximize the work done by the CPU.What is this concept of switching among multiple programs in memory called?

Which of the following is a computer programming language developed in the 1960s that is still commonly used for older ("legacy")business applications?